Initial commit of Minikin library

This is the initial draft of Minikin, a library intended to perform text
layout functions. This version does basic weight selection and font runs
for scripts, and also has a simple renderer for drawing into bitmaps,
but is lacking measurement, line breaking, and a number of other
important features. It also lacks caching and other performance
refinements.

Change-Id: I789a2e47d11d71202dc84b4751b51a5e2cd9c451

2 files changed, 142 insertions, 0 deletions

diff --git a/sample/Android.mk b/sample/Android.mk
new file mode 100644
index 0000000..335e7ce
--- /dev/null
+++ b/sample/Android.mk
@@ -0,0 +1,42 @@
+# Copyright (C) 2013 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+LOCAL_PATH:= $(call my-dir)
+
+include $(CLEAR_VARS)
+include external/stlport/libstlport.mk
+
+LOCAL_MODULE_TAGS := tests
+
+LOCAL_C_INCLUDES += \
+	external/harfbuzz_ng/src \
+	external/freetype/include \
+	external/icu4c/common \
+	frameworks/minikin/include
+
+LOCAL_SRC_FILES:= example.cpp
+
+LOCAL_SHARED_LIBRARIES += \
+	libutils \
+	liblog \
+	libcutils \
+	libstlport \
+	libharfbuzz_ng \
+	libicuuc
+
+LOCAL_STATIC_LIBRARIES += libminikin libft2
+
+LOCAL_MODULE:= minikin_example
+
+include $(BUILD_EXECUTABLE)
diff --git a/sample/example.cpp b/sample/example.cpp
new file mode 100644
index 0000000..3f0ad9d
--- /dev/null
+++ b/sample/example.cpp
@@ -0,0 +1,100 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// This is a test program that uses Minikin to layout and draw some text.
+// At the moment, it just draws a string into /data/local/tmp/foo.pgm.
+
+#include <stdio.h>
+#include <vector>
+#include <fstream>
+
+#include <unicode/unistr.h>
+#include <unicode/utf16.h>
+
+#include <minikin/Layout.h>
+
+using std::vector;
+
+namespace android {
+
+FT_Library library;  // TODO: this should not be a global
+
+FontCollection *makeFontCollection() {
+    vector<FontFamily *>typefaces;
+    const char *fns[] = {
+        "/system/fonts/Roboto-Regular.ttf",
+        "/system/fonts/Roboto-Italic.ttf",
+        "/system/fonts/Roboto-BoldItalic.ttf",
+        "/system/fonts/Roboto-Light.ttf",
+        "/system/fonts/Roboto-Thin.ttf",
+        "/system/fonts/Roboto-Bold.ttf",
+        "/system/fonts/Roboto-ThinItalic.ttf",
+        "/system/fonts/Roboto-LightItalic.ttf"
+    };
+
+    FontFamily *family = new FontFamily();
+    FT_Face face;
+    FT_Error error;
+    for (size_t i = 0; i < sizeof(fns)/sizeof(fns[0]); i++) {
+        const char *fn = fns[i];
+        printf("adding %s\n", fn);
+        error = FT_New_Face(library, fn, 0, &face);
+        if (error != 0) {
+            printf("error loading %s, %d\n", fn, error);
+        }
+        family->addFont(face);
+    }
+    typefaces.push_back(family);
+
+#if 0
+    family = new FontFamily();
+    const char *fn = "/system/fonts/DroidSansDevanagari-Regular.ttf";
+    error = FT_New_Face(library, fn, 0, &face);
+    family->addFont(face);
+    typefaces.push_back(family);
+#endif
+
+    return new FontCollection(typefaces);
+}
+
+int runMinikinTest() {
+    FT_Error error = FT_Init_FreeType(&library);
+    if (error) {
+        return -1;
+    }
+    Layout::init();
+
+    FontCollection *collection = makeFontCollection();
+    Layout layout;
+    layout.setFontCollection(collection);
+    layout.setProperties("font-size: 32;");
+    const char *text = "hello world";
+    icu::UnicodeString icuText = icu::UnicodeString::fromUTF8(text);
+    layout.doLayout(icuText.getBuffer(), icuText.length());
+    layout.dump();
+    Bitmap bitmap(200, 50);
+    layout.draw(&bitmap, 10, 40);
+    std::ofstream o;
+    o.open("/data/local/tmp/foo.pgm", std::ios::out | std::ios::binary);
+    bitmap.writePnm(o);
+    return 0;
+}
+
+}
+
+int main(int argc, const char** argv) {
+    return android::runMinikinTest();
+}
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